Display screen or portion thereof with transitional graphical user interface



FIG. 1 is the first image in a sequence for a display screen or portionthereof with transitional graphical user interface showing our newdesign;

FIG. 2 is the second image thereof;

FIG. 3 is the third image thereof;

FIG. 4 is the fourth image thereof;

FIG. 5 is the fifth image thereof;

FIG. 6 is the sixth image thereof;

FIG. 7 is the seventh image thereof;

FIG. 8 is another image of FIG. 1, in which a mobile terminal and adisplay screen in broken lines are provided to illustrate an exampleenvironment;

FIG. 9 is another image of FIG. 2, in which a mobile terminal and adisplay screen in broken lines are provided to illustrate an exampleenvironment;

FIG. 10 is another image of FIG. 3, in which a mobile terminal and adisplay screen in broken lines are provided to illustrate an exampleenvironment;

FIG. 11 is another image of FIG. 4, in which a mobile terminal and adisplay screen in broken lines are provided to illustrate an exampleenvironment;

FIG. 12 is another image of FIG. 5, in which a mobile terminal and adisplay screen in broken lines are provided to illustrate an exampleenvironment;

FIG. 13 is another image of FIG. 6, in which a mobile terminal and adisplay screen in broken lines are provided to illustrate an exampleenvironment; and,

FIG. 14 is another image of FIG. 7, in which a mobile terminal and adisplay screen in broken lines are provided to illustrate an exampleenvironment.

In the drawings, the dot-dash broken lines are for the purpose ofillustrating an unclaimed boundary line and form no part of the claimeddesign. The broken lines are for the purpose of illustratingenvironmental structure that form no part of the claimed design.

The appearance of the display screen or portion thereof withtransitional graphical user interface sequentially transitions betweenthe images shown in FIGS. 1-7 and in FIGS. 8-14. The process or periodin which one image transitions to another forms no part of the claimeddesign.

CLAIM We claim the ornamental design for a display screen or portionthereof with transitional graphical user interface, as shown anddescribed.